Where does “wah” come from?

wah (Old High German) comes from Proto-West Germanic wai, from Proto-Germanic wai, from Proto-Indo-European wai — oh!; woe!.

Ancestry of “wah”, step by step

StepLanguageWordMeaning
1Proto-West Germanicwaiwoe!, alas!
2Proto-Germanicwaiwoe! alas!
3Proto-Indo-Europeanwaioh!; woe!

Words derived from “wah

Every word from Proto-Indo-European waiEvery word from Proto-Germanic waiEvery word from Proto-West Germanic wai